Wulandary, S., M. Tafsin, and Faisal. “Seroprevalence and Risk Factor Analysis of Hog Cholera Disease at Small Farm in Deli Serdang Regency”. Indonesian Journal of Agricultural Research, vol. 4, no. 1, Apr. 2021, pp. 21 -30, doi:10.32734/injar.v4i1.5165.